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14. Serial communication and instrument network
The instrument is fitted with a main multistandard serial communication port RS232C/RS485
and an auxiliary AUX COM serial port RS232C.
The main port is connected to terminals 11, 12 and 13, the auxiliary AUX COM port has its own
3-pole connector near terminal 10.
For fixed connection to a PC, instrument management, RS485 network connection, etc. you
will use the standard port. The auxiliary port is used for temporary connections, e.g.
instrument configuration. By using the auxiliary port, you don’t have to disconnect and
reconnect the cables fixed to the terminal board.
Thanks to the RS485 protocol it is possible to connect more than one instrument to form a
network managed by the DeltaLog12 software provided.
14.1. Protocol selection
The
communication protocol
(RS232C or RS485) is selected by shifting the dip-switch on
the board between terminals 10 and 11.
The selection of the main
physical port
RS232C, RS485 or auxiliary RS232C AUX COM is
performed from the menu “MENU >> SERIAL” or using the DeltaLog12 software.
To ease configuration, the instruments are set up in the factory for communication through the
AUX COM port.
Upon turning on, the instrument switches the serial port to AUX COM for one minute.
This allows sending, through the AUX COM port, the command selecting the desired
configuration.
If no command is received, after one minute, the instrument loads the last stored
configuration.
WARNING: The instrument supports only one communication channel at a time.
Consequently, if the instrument is used into an RS485 network or is connected to an
external device or to a PC through RS232, when the AUX COM port is selected, it won’t
be detected in the network and will not reply to the commands sent by other network
devices.
AUX SERIAL PORT
MAIN SERIAL PORT
Dip-switch to select the
communication
protocol.
Summary of Contents for HD2817T Series
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